Materials: sterling silver, Nickel-free, Lead-free, Cadmium-free and real Hypoallergenic, will not hurt your skin. Mothers necklace adopts the four-prong inlaid technique, 5A cubic zirconia not easy to fall from the heart necklaces. Chain Length:18 inches + 2 inches Extender; Pendant Size: 1.2 inches(L), 0.6 inches(W). It can be adjusted the length for any outfit.